are traditionally, for a very long period of time, nearly a century, succesfully used sensors for potentiometric determination of H+, respective H3O+ activity, expressed in commonly used pH units. These measurements are, perhaps, done in all fields of research, development, process, and in other human activities. Electrodes are applicable to all commonly used measuring apparatus with inner resistance of 1012Ω or more. Standard electrical connecting element is 0,8 to 1 mt. coaxial cable, specially low noice, with BNC connector. Others are as described above. The electrodes with thermocompensation elements are equipped with multiwire coaxial cable and coaxial connector and banana, as for example DIN coaxial connector and banana for WTW pH meters.

If not indicated other, glass body is o.d. 12 mm, total length 135 mm. Laboratory sensors, the "L" in type number, have cap o.d. 16 mm, they are equipped with filling hole for reference solution filling or changing for common maintenance of the electrode, process ones, the "P" in type number, have a cap with armature fixing ring, o.d. 18 mm, adapter with ring or thread, cap with thread and others for fixing the electrode into measuring cell equipped so. These possibilities have to be specified and will be manufactured upon request.

The process use combined electrodes are designed without filling hole, as maintenanceless, filled with gellic reference electrolyte for deminishing the reference salt dilution during use. In spite of, being stored out of using, there is recommended to store them in a solution KCl, c = 3,0 mol/l. The first digit 6 indicates combined pH glass electrode with plastic body, which is constructed as maintenanceless, with gel reference electrolyte. Standard electrical connecting element is 0,8 to 1 mt. special low noice coaxial cable with BNC connector. Electrodes with temperature sensor are connected with special low noise tripple shielded triax cable or four wire cable. Other lengths of cable is available, upto 20 mts. Others like these: The "+" in type number is:

1 cable with banana or without any connector, for clemming in apparatus

2 cable with BNC connector

5 cable with SN6 connector

6 SN6, S7 head connector

7 cable with DIN connector

8 cable with CINCH connector

0 cable with SMS connector.

The electrodes with thermocompensation elements are equipped with multiwire coaxial cable and coaxial connector and banana, as for example DIN coaxial connector and banana for WTW pH meters. The second digit in type number indicates the shape and dimension of sensing element or other identification, as described further. All the combined electrodes are available, upon request, without filling hole, with gel reference electrolyte, as the maintenanceless ones. Common reference unit is an argentchloride one, filling solution KCl, c = 3,0 mol/l, AgCl, c = sat.

The electrodes with a saturated calomel reference unit are available upon request. The spear tip electrodes for piercing are suitable for pH measurement in paste-like materials, semimicro spear tip ones are especially suitable for small amount sample measurement, for example in "Eppendorf" sample vessels. Changes in construction are available upon request. Used adapter with a thread PG 13,5 can be as well as with thread M 20 x 1,5 thread G 3/8" G 1/2", sliding cone NZ14 or others, upon request, for placing into apparatus measuring cell. The requested thread can be manufactured on electrode cap, as well. Atypical electrodes, custom made, upon request with description.